This grade 2 arrays worksheet answer key solves all 24 problems of the arrays and equal groups worksheet step by step.
Every solution below shows the repeated addition equation and the total. Some answers include a picture with running totals. Use the key to check work, and ask students to explain whether they added rows or columns.
Grade 2 Arrays Worksheet Answer Key: problems 1–5
Problem 1: Count rows and columns
Rows go across. There are 3 rows. Columns go up and down. There are 4 columns.
Problem 2: Rows and columns again
There are 5 rows and 2 columns. Each row has 2 dots.
Problem 3: Add the rows
There are 3 rows with 5 dots in each row.
\(5+5+5=15\)
The total is 15 dots.
Problem 4: Add the columns
There are 3 columns with 4 dots in each column.
\(4+4+4=12\)
The total is 12 dots.
Problem 5: Two rows of three
2 rows of 3: \(3+3=6\).
There are 6 stars.
Grade 2 Arrays Worksheet Answer Key: problems 6–10
Problem 6: Five rows of two
5 rows of 2: \(2+2+2+2+2=10\).
Skip count by 2s: 2, 4, 6, 8, 10. The total is 10.
Problem 7: Finish the addition
\(5+5=10\), \(10+5=15\), \(15+5=20\).
The sum is 20.
Problem 8: Four by four
4 rows of 4: \(4+4+4+4=16\).
There are 16 squares.
Problem 9: Muffin tin
\(2+2+2=6\).
The tin holds 6 muffins.
Problem 10: Window panes
\(3+3+3+3=12\).
The window has 12 panes.
Grade 2 Arrays Worksheet Answer Key: problems 11–15
Problem 11: Draw an array
Draw 3 rows with 5 dots in each row. Then add: \(5+5+5=15\).
The total is 15.
Problem 12: Seats in a van
\(2+2+2+2+2=10\).
The van has 10 seats.
Problem 13: Same total
Array A has 4 rows of 3: \(3+3+3+3=12\).
Array B has 3 rows of 4: \(4+4+4=12\).
Both arrays have 12 dots, so the totals are the same.
Problem 14: Sticker rows
\(5+5+5+5=20\).
There are 20 stickers on the page.
Problem 15: How many rows?
There are 5 addends, so there are 5 rows. Each addend is 3, so each row has 3 objects.
Grade 2 Arrays Worksheet Answer Key: problems 16–20
Problem 16: How many in each row?
Try 3 in each row: \(3+3+3+3=12\). It works.
Each row has 3 dots.
Problem 17: Doubles
\(4+4=8\). This is a doubles fact: 4 and 4.
The total is 8.
Problem 18: Sticker sheet
\(5+5+5+5+5=25\).
Skip count by 5s: 5, 10, 15, 20, 25. The sheet has 25 stickers.
Problem 19: Garden rows
\(5+5+5+5=20\).
Priya plants 20 tomato plants.
Problem 20: Theater seats
Step 1: \(5+5+5=15\) seats in all. Step 2: \(15-6=9\).
9 seats are empty.
Grade 2 Arrays Worksheet Answer Key: problems 21–24
Problem 21: Two cookie trays
Tray 1: \(4+4+4=12\). Tray 2: \(4+4=8\).
Together: \(12+8=20\). There are 20 cookies.
Problem 22: Find the mistake
There are 4 rows, so there should be 4 addends. Diego used only 3 addends.
Correct: \(5+5+5+5=20\). The total is 20.
Problem 23: Rows and columns both
Rows: \(5+5+5+5=20\).
Columns: there are 5 columns with 4 photos in each column, \(4+4+4+4+4=20\).
Both totals are 20, so they match.
Problem 24: Buttons
An array with 4 rows of 5 needs \(5+5+5+5=20\) buttons.
\(20-18=2\). Aisha needs 2 more buttons.
How to use this grade 2 arrays worksheet answer key
Read this grade 2 arrays worksheet answer key after trying each problem yourself, and redo any problem you missed.
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Grade 2 Arrays and Equal Groups worksheet answer key
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